Overview

The SGP Package is open source software built for theR softwareenvironment. The classes, functions and data within the SGP packageare used to calculate student growth percentiles and percentile growthprojections/trajectories using large scale, longitudinal assessmentdata. Quantile regression is used to estimate the conditional densityassociated with each student's achievement history. Percentile growthprojections/trajectories are calculated using the derived coefficientmatrices and show the percentile growth needed to reach futureachievement targets.

Installation

>install.packages("SGP")

> devtools::install_github("CenterForAssessment/SGP")

Resources

• SGP GitHub Pages
• CRAN Repo
• Norm-and Criterion-Referenced Student Growth

Contributors

The SGP Package is crafted with❤️ by:

• Damian Betebenner
• Adam R. Van Iwaarden
• Ben Domingue
• Yi Shang

We love feedback and are happy to answer questions.

References

Betebenner, D. W., VanIwaarden, A., Domingue, B., and Shang, Y.(2023). SGP: Student Growth Percentiles & Percentile GrowthTrajectories.

R Core Team (2023). R: A language and environment for statisticalcomputing. R Foundation for Statistical Computing, Vienna, Austria. URLhttps://www.R-project.org/.